Ten 18 litre (coke) kegs at the moment, but I could use another 4. When I bought the system, I got 6 kegs at $10 each.....the local coke bottler was trying to get rid of them. When I realized I needed more, they didn't have any left. I eventually got another 4 at $15 each from a guy who had bought about 100 from the coke plant.